Institut de Chimie Moléculaire et des Matériaux d'Orsay

"SQUID" Magnetometer

Laser Nd : YAG pulsé + OPO

Contact

Eric RIVIERE

Send an email

LCI - Build.: 420

Tel.: 01 69 15 78 21

 

Activity

Characterization of the magnetic properties for compounds generally in the solid state: magnetization (dc) vs temperature (from 2 to 400 K) or vs magnetic field (from 0 to +/- 7 T) measurements, alternative susceptibility (ac) measurements (frequency from 0.1 to 1500 Hz).

Determination of the electronic configurations for the magnetic centers, of the exchange coupling parameters, of anisotropy parameters. Characterization of superparamagnetic or superconducting compounds.


DC measurements

The sample is set in a uniform magnetic field where it acquires a magnetization then the sample is moved vertically. The variation in magnetic flux generated by this movement creates an electric current in a superconductive circuit. This current is converted by a SQUID sensor (Superconducting Quantum Interference Device) into an electrical signal proportional to the magnetization of the sample.


Samples

Bulk, powder, nanoparticles, films. Solutions can be considered.


How to use it

The measurements are carried out by the engineer, except for ICMMO researchers after training.


Options

Measurements under (or after) light irradiation (pulsed or cw lasers - Wavelengths: from 355 to 1600 nm).

Usefull links:

Francophone magnetometry network MagNETometrie_petit.png
European Magnetometry Network Magnetometry.png
Curve simulation software: Phi Phi.png